重要的考试要点.doc

单词第六单元matrix 矩阵intuitive 直觉的develop 开发debug 调试maintain 维护simulation 仿真built-in 内置的，嵌入的embedded system 嵌入式系统interactive 交互式的matrices matrix的复数polynomial 多项式的interpolation 插值法；篡改；插补evaluation 赋值;估价；评估curve fitting 曲线拟合partial fraction expansion 部分分数展开convolution 卷积regression 回归；回旋；回转sparse 稀疏的，稀少的animation 动画制作histogram 柱状图mesh 网格，网孔triangulated 三角式，三角形scalar 标量；a.梯状的vector 矢量homegrown 国产的，本地生产的numerical integration 数值积分quadrature 求积分iterative 迭代的；重复的；反复的ODEs（ordinary differential equations）常微分方程 DAE(differential algebraic equations) 微分代数方程 PED (partial differential equations) 偏微分方程 GUIs(graphical user interfaces) 图形用户界面 filter 滤波器，过滤器passband 通带stopband 阻带response 响应array 数组，阵列element 元素singular value 奇异值grid 格子，珊格modeling 建模factorization 因数分解on the fly 飞着，急匆匆，迅速第七单元modulation 调制，调谐 modulatedemodulation 解调，检波 modeminformation 信息，数据communication 传递，通信amplitude 振幅，幅度phase 相位，位相amplitude modulation AM 幅度调制 frequency modulation FM 频率调制phase modulation PM 相位调制waveform 波形wavelength 波长pulse 脉冲,脉搏absorption 吸收periodic 周期的，定期的detection 检波carrier 载波sinusoid 正弦波trapezoidal 梯形的envelope 包络excursion 偏移, 漂移bunch up 聚成一团spread out 展开index 指数oscilloscope 示波器 over-modulation 过调制alternative 二中择一；可供选择的办法duration 持续时间, 为期baseband 基带quantize 使量子化prescribe 指示, 规定analog 模拟sample 取样digitized 使（数据）数字化第八单元mechanic n.技工, 机修工, 机械师mechanics n. 机械学、力学mechanical adj.机械的, 机械制的mechanicals n.工业制品mechanism n. 机械装置, 机构, 机制machine n.机器, 机械, 机动车辆machinery n.总称 机器, 机械tape handler 带传动机构chain-drive mechanism 链传动机构gear mechanism 齿轮机构cam mechanism 凸轮机构screw mechanism 螺旋机构rigid member 刚性构件flexible member 弹性构件(柔性构件)internal-combustion engine 内燃机prime mover 原动机working machine 工作机lathe 车床engine lathe 普通车床numerical control lathe 数控车床Tracer or duplicating lathes 靠模车床或仿形车床 Turret lathes 六角（转塔）车床 Automatic screw machines 自动螺丝车床 Vertical turret lathes 立式六角（转塔）车床 Machining centers 车床加工中心 chucking lathe 卡盘车床automatic stop 自动止动器，自动止动装置carriage （机床的）拖板，溜板shoulder （机械的）肩形凸出部，台肩，凸头groove 凹槽，沟attachment 附件，附属装置template 样板，模板holder 夹持装置，固定器square turret 四方刀架collet 夹头，有缝夹套bar stock 棒材，型材 stock n. 原料，股票revolving table 旋转工作台mount 安装，固定tooling 机床安装，刀具加工forging 锻件 forge v.锻造、稳步前进casting 铸件 cast (n.投掷、铸造、演员表) heavy-duty 重型的，耐用的，高功率的tapered 锥形的contour 轮廓，形状，外形drilling 钻孔 duplicating 复制, 重复network securityencryption 加密技术 decryption 解密技术 symmetric 对称的 asymmetric 不对称的 cryptanalysis 密码分析 cryptography 密码学 knapsack algorithms 背包算法 discrete logarithms 离散对数 transposition 变位 substitution 替换 authentication protocols 鉴别协议 authorization 授权replicate 复制 breach 突破，裂口imposter 冒名顶替者 intruder 入侵者secretkey 密钥 digital signature 数字签名 malicious 恶毒的 pernicious 有害的 lurk 潜伏 violation 侵害 benign 良性的 catastrophic 悲惨的，灾难的 shell 界面 wrap 隐藏，包围hacker 骇客 cracker 解密高手wire speed 网速 router 路由器virus 病毒 firewall 防火墙vice versa 反之亦然 by no means 决不 oblivious 遗忘的，忘却的 boot up 爆发 课后练习第六单元matrix computation矩阵计算control system design 控制系统设计open architecture开放式结构image processing toolbox图像处理工具箱earth and life science地球与生命科学structed language结构化语言geographic mapping地理映射exeternal routine外部路由器I/Q进入/退出curve fitting曲线拟合第七单元We will consider three cases: amplitude modulation (AM), in which the amplitude A varies with time: frequency modulation (FM), in which the frequency varies with time; or phase modulation (PM), in which the phase varies with time.调制分为以下三种：幅度调制、频率调制和相位调制。在这三种调制方式中幅值A、频率和相位分别随时间而变化。 The constant m is called the modulation index. It specifies the fractional variation of the modulation function about its mean value.常数m称为调制指数。它体现了调制函数平均值的分数变化率。一个完善的周期波，例如正弦波不能携带任何信A perfectly periodic waveform, such as a sine wave cannot carry any information. 每当波形可表示为一系列正弦波的迭加时，各正弦波的振幅可以用所谓频谱形象地显示出来。 When the waveform can be expressed as a superposition by a series of sine waves, the amplitude of them can be visualized by frequency spectrum.经振幅调制的波的包络线与调制波形相同。The envelope of the modulated wave is identical to the modulation waveform. speech waveform 语音波形data telephone line 数据电话线information-carrying waveform 传递信trapezoidal wave 梯形波percent modulation 调制百分数peak-to-peak 峰-峰over modulate 过调制 frequency spectrum 频谱 振幅调制 amplitude modulation相位调制 phase modulation平均功率 mean power周期信号 periodic signal光波长 light wavelength第八单元研究常用机构（如连杆机构、凸轮机构、齿轮机构等）的类型、工作原理及运动特性分析和机构设计的基本原理及方法。Study the type, operational principle and motion characteristics analysis of common mechanism (such as link mechanism, cam mechanism, gear mechanism, etc.).研究在进行具体机械设计时机构的选型、组合、变异及机械传动系统运动方案的设计等问题。 Study mechanical selection, combination and variation during the specific design. Study the motion conceptual design of mechanical drive system, and so on.Lathes (shown in Figure 8-1) are widely used in industry to produce all kinds of machined parts. Some are general purpose machines, and others are used to perform highly specialized operations.如图8-1所示，在工业上车床被广泛的应用于各种机械工件的制造。其中包括普通工件和一些专业高水平机器。 Many of the larger lathes come equipped with attachments not commonly found in the ordinary shop, such as automatic stops for the carriage.许多大型车床装配所用的附件在普通车间通常是见不到的，比如说溜板上的自动止动装置。Screw machines are similar in construction to turret lathes, except that their heads are designed to hold and feed long bars of stock.螺丝车床在构造上和六角转塔车床类似，除了用于支撑和进给长型棒材的前端设计。It consists of a turret, a revolving table, and a side head with a